Decorative tree



FIG. 1 is a front view of a decorative tree showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof, the right side being a mirror image thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines in the drawings represent portions of the decorative tree that form no part of the claimed design. 

CLAIM The ornamental design for a decorative tree, as shown and described. 